US10320026B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10320026-B2 |
| Application number | US-201515521272-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 16, 2015 |
| Priority date | Oct 21, 2014 |
| Publication date | Jun 11, 2019 |
| Grant date | Jun 11, 2019 |
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A secondary battery which is highly safe even when it becomes in excessively high-temperature conditions and is excellent in cycle characteristics, and an electrode for a secondary battery are provided. The present invention relates to an electrode for a secondary battery comprising a maleimide compound and a conductive agent, wherein the conductive agent comprises at least one selected from carbon nanotube and carbon nanohorns.
Opening claim text (preview).
The invention claimed is: 1. An electrode for a secondary battery comprising a maleimide compound, a conductive agent and an electrode active material, wherein the maleimide compound is a maleimide resin compound comprising a repeating unit comprising a maleimide monomer residue and a dione compound residue, the conductive agent comprises at least one selected from carbon nanotubes and carbon nanohorns, and a ratio of a coverage of the maleimide compound on the electrode active material to a coverage of the conductive agent on the electrode active material is 0.15 to 2. 2. The secondary battery electrode according to claim 1 , wherein the maleimide compound has two or more maleimide groups. 3. The secondary battery electrode according to claim 1 , wherein the maleimide compound comprises a polymer which is a reaction product of a bismaleimide and a barbituric acid. 4. The secondary battery electrode according to claim 1 , wherein the conductive agent comprises a carbon nanotube. 5. The secondary battery electrode according to claim 4 , wherein the average D/G ratio according to Raman spectroscopic measurement of the carbon nanotube is 0.2 to 1.2. 6. The secondary battery electrode according to claim 4 , wherein the aspect ratio of the carbon nanotube is 200 to 900. 7. The secondary battery electrode according to claim 1 , wherein the conductive agent further comprises carbon black. 8. A secondary battery comprising the secondary battery electrode according to claim 1 . 9. The secondary battery according to claim 8 comprising the secondary battery electrode as a positive electrode. 10. An assembled battery comprising the secondary battery according to claim 8 . 11. The secondary battery electrode according to claim 1 , wherein the ratio is 0.15 to 1. 12. The secondary battery electrode according to claim 1 , wherein an amount of the maleimide compound is 0.1 to 1.0 wt % of the electrode active material and an amount of the conductive agent is 0.5 to 4.5 wt % of the electrode active material. 13. The secondary battery electrode according to claim 1 , wherein the maleimide compound is a maleimide resin compound prepared by reacting a maleimide monomer and a dione compound in a solvent containing a Bronsted base. 14. The secondary battery electrode according to claim 1 , wherein an amount of the maleimide compound is 0.1 wt % or less of the electrode active material.
Processes of manufacture · CPC title
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Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title
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